JPH0245949Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a voltage selection switch suitable for use in stereo equipment, television receivers, and various other electronic equipment for export. The present invention relates to a voltage changeover switch for use in a voltage changeover switch, which improves reliability and enables cost reduction by simplifying the structure of the changeover contact, reducing the number of parts used, and downsizing.

BACKGROUND OF THE INVENTION Voltage selector switches are used in various electronic devices so that a predetermined design output voltage can be obtained even in regions where the power supply voltage is different, and are often installed in electronic devices for export. This voltage selector switch normally only needs to be set once to the power supply voltage intended for the exporting country and does not need to be changed after that, so it is desirable to have a structure that is as small as possible and does not cause malfunctions. There is.

FIG. 1 is an exploded perspective view, partially cut away, showing the main structure of a conventional voltage changeover switch. In the drawing, 1 is the switch body (housing), 1A
is the fixed terminal, 1B is the lead piece, 1C is the shot bar (conductor piece), 1D is the bearing part, 1E is the mounting hole for screws, etc., 1F is the reference index, 2 is the rotor, and 2A is the driver etc. for rotating it. 2B is an index, 2C is a rotating shaft, 3 is a movable contact piece, and 4 is a spring.

Although only a portion is shown in FIG. 1, below the center of the rotor 2 is a rotating shaft 2C.
protrudes, and in the assembled state, is inserted and locked into the bearing portion 1D of the switch body 1, and is configured to be rotatable around the rotating shaft 2C. Note that a clasp or the like is used to lock the bearing portion 1D.

Further, the pair of movable contact pieces 3 and the spring 4 are respectively stored in storage portions provided at the lower part of the rotor 2 made of an insulating material.
It is rotated and moved as the . Therefore, the state of connection between the movable contact piece 3 and the group of fixed terminals 1A of the switch body 1 and the short bar 1C is changed.

The voltage changeover switch shown in FIG. 1 has a structure that allows switching in four stages, and four connection states can be obtained.
For the switching operation, if a screwdriver or the like is inserted into the insertion groove 2A of the rotor 2 and rotated, the rotor is rotated one step at a time to the left and right, making it possible to perform switching in a total of four steps.

In this case, these four-stage switching states are
As will be clear during operation, the movable contact piece 3 has a central part that projects downwards and is further supported by a spring 4.
is being pushed downward by.

Therefore, switching operations at each stage are performed intermittently, and the reference index 1F of the switch body 1
Also by the index 2B of the rotor 2, it is possible to visually confirm which position is selected.

However, in such a conventional voltage changeover switch, the movable contact piece 3, spring 4, etc. must be assembled accurately, making the assembly work troublesome.Furthermore, the shot bar 1C is also required, making the entire switch large. Become.

In this way, conventional switches use a relatively large number of parts and have a complex structure.
There were many disadvantages such as decreased reliability and increased cost.

Problems to be Solved by the Invention The voltage changeover switch of this invention solves these inconveniences in conventional voltage changeover switches that set the power supply voltage for exporting countries, and reduces the number of parts used by simplifying the structure. At the same time, it enables miniaturization and improves reliability.
The aim is also to shorten assembly work time and reduce costs.

Means for Solving the Problems This invention has a main body made of an insulating material, a hollow cylinder whose one disc surface is not covered, and arranged circumferentially below the cylinder in the main body. and the rotor 6 in a plane perpendicular to the rotation axis of the rotor 6.
are arranged facing each other around the rotational axis of the
Alternatively, a fixed terminal 9 that can be contacted with one of the second movable contact pieces, a fixed terminal 10 that can be contacted simultaneously with the first and second movable contact pieces, and a fixed terminal 9 that is located at the center of the circumference and rotates the rotor 6. Bearing portion 5 with which the tip of the shaft is engaged
C; a disc-shaped lid portion 6A made of an insulating material and covering a circular surface of the main body portion of the housing 5; and a groove 6B provided on one surface of the lid portion 6A. A rotor 6 having a rotating shaft 6C provided at the center of the other surface.
and, directly fixed to the rotation axis of the rotor 6, extending in a radial direction with respect to the rotation axis of the rotor 6, and at both ends on a plane perpendicular to the rotation axis,
a first movable contact piece 7 (or 12) made of a thin plate-like elastic conductor having a contact portion that comes into contact with the fixed terminals 9, 10; directly fixed to the rotation axis of the rotor 6 in a state, extending in a radial direction with respect to the rotation axis of the rotor 6, and at both ends on a plane perpendicular to the rotation axis,
and a second movable contact piece 8 (or 13) made of a thin plate-like elastic conductor having a contact portion that comes into contact with the fixed terminals 9 and 10.

Embodiment Next, an embodiment of the voltage changeover switch of this invention will be described in detail with reference to the drawings.

In summary, the voltage changeover switch of this invention uses only two movable contacts, and is configured to connect fixed terminals at positions substantially opposite to the rotating shaft of the rotor. This makes it possible to downsize the rotor and eliminate the need for it, and during assembly work, the work can be completed by simply attaching these movable contact pieces to the rotating shaft of the rotor and pushing them into the housing.

Figures 2 1 to 5 are diagrams illustrating the appearance of the voltage changeover switch of this invention and how to attach it to the panel.
1 is a front view of the voltage selection switch, 2 is the arrow P of 1
Partially cutaway side view seen from the direction, 3 is arrow Q of 1
4 shows a rear view, and 5 shows a mounting hole of the panel. In the drawing, 5 is a housing, 5A is its index, 5B is a claw part, 6 is a rotor, 6A is a disc-shaped lid part, 6B is an insertion groove for a screwdriver, etc., 6C is a rotating shaft, and 6D is a rotating shaft. 6C is the housing claw stopper at the tip, 7 is the first movable contact piece, 8 is the second movable contact piece, 9 is a fixed terminal of one contact that is independent from other contacts, and 10 is the adjacent contact and electrical connection. Fixed terminal with 2 contacts connected to
11 is a panel, and 11A indicates its mounting hole.

The voltage changeover switch of this invention is capable of switching, for example, in five stages, as shown in FIG.

The method for attaching the switch to the panel is carried out by pushing the switch into the attachment hole 11A of the panel 11 shown in FIG. 2 from the bottom, that is, in the direction of arrow R. When you press the switch, the second
Once the claw portion 5B of FIG. 2 is bent inward and the lower part of the switch is completely pushed in, the claw portion 5B returns outward. In this way, the switch
is completely sandwiched between the lower surface of the flange of the housing 5 and the upper end of the claw portion 5B.

FIG. 3 is a circuit diagram showing an example of the use of the voltage changeover switch of this invention. In the drawing,
VSW is a voltage selection switch, T1 to T6 are fixed terminals, A and B are movable contacts, PT is a power transformer,
SW indicates a power switch, and FS indicates a fuse.

The movable contacts A and B of the voltage selection switch VSW are
It can be switched in 5 stages.

(1) Movable contact piece A is T2-T3, movable contact piece B is T4
-When connecting T5, power transformer
The output of PT is OV, which is the off state.

(2) Movable contact piece A is T1-T5, movable contact piece B is T2
- When T6 is connected, the output will be 11OV.

(3) Movable contact piece A is T3-T6, movable contact piece B is T1
- When T4 is connected, the output is 12OV.

(4) When movable contact pieces A and B both connect T2-T5, the voltage is 220V.

(5) When movable contact pieces A and B both connect T3-T4, the voltage becomes 240V.

4 are diagrams showing the internal structure of one embodiment of the voltage changeover switch of this invention, 1 is a top view of the housing 5, 2 is a bottom view of the rotor 6, and 3 is a 2
4 is a side view seen from the direction of arrow S in 2, and 4 is a side view seen from the direction of arrow T in 2. Reference numerals in the drawings are the same as in FIG. 2, and 5C is a bearing provided at the center of the housing 5, 6E is a mounting portion of the first movable contact piece 7 provided on the rotating shaft of the rotor 6,
Similarly, 6F indicates a mounting portion of the second movable contact piece 8.

As shown in FIG. 4, the housing 5 has a plurality of fixed terminals 9 and 10 arranged in a circumferential manner, and a bearing portion 5C is provided at the center thereof. Further, the fixed terminal 9 is capable of contacting one of the first or second movable contact pieces 7 and 8, and the fixed terminal 9
can contact the first and second movable contact pieces 7, 8 at the same time. The movable contacts 7 and 8 are connected to each other, that is, at the center of the upper surface of the fixed terminal 9 shown in FIG. A V-shaped groove is formed to ensure reliable contact with the tips of pieces 7 and 8 and to confirm the selected position. Correspondingly, the tips of the movable contact pieces 7 and 8 are bent downward to form a V-shape.

The number and arrangement of the fixed terminals 9 and 10 are determined depending on the number of switching stages of the switch, etc.

FIG. 5 is a perspective view of essential parts showing a state in which the first and second movable contact pieces are attached to the rotor shown in FIGS. 2-4. The symbols in the drawings are the same as in FIG. 4, and 7A and 7B are the first movable contact pieces 7.
7C is a claw stopper, and 8A is a bending stopper of the second movable contact piece 8.

In FIG. 5, the lid part 6A of the rotor 6 and the rotating shaft 6C are separated, and the structures of the mounting part 6E of the first movable contact piece 7 and the mounting part 6F of the second movable contact piece 8 are clearly shown. Illustrated as such.

The following FIGS. 1 and 2 are views showing an example of the first movable contact piece 7, in which 1 is a top view and 2 is a side view seen from the direction of arrow W in 1. The code in the drawing is the 4th
It is similar to FIG.

7. FIGS. 1 and 2 are views showing an example of the second movable contact piece 8, in which 1 is a top view and 2 is a side view viewed from the direction of arrow X in 1. The reference numerals in the drawings are the same as in FIGS. 4 and 5, and 8B indicates a pawl stopper.

In the voltage changeover switch of this invention, as shown in FIG. , can be installed extremely easily by simply inserting them in the direction of arrows U and V, respectively. The lengths of the two movable contact pieces 7 and 8 are appropriately selected so that appropriate elasticity is generated in the assembled state, and both ends have good contact with the fixed terminals 9 and 10. The state is obtained.

A housing pawl stop 6D provided at the tip of the rotating shaft of the rotor 6 is attached to the housing 5 when the first movable contact piece 7 and the second movable contact piece 8 are attached as shown in FIG. When incorporated, it acts,
It engages with the bearing portion 5C at the center of the housing 5.

That is, when the rotor 6 assembled in the state shown in FIG. 5 is pushed into the housing 5 shown in FIG. Figure 2 2
As shown in FIG. 2, the assembly is fixedly supported on the lower surface of the housing 5, and the assembly work is completed.

In this way, the voltage changeover switch of this invention is
The number of parts used is significantly smaller than that of conventional models, and there is no need for a shot bar. On top of that,
Assembly work can also be done easily and accurately.

The following FIG. 8 is a perspective view of essential parts showing another embodiment of the rotor and two movable contact pieces in the voltage changeover switch of this invention. The numbers in the drawings are the same as those in FIGS. 4 and 5, and 12 is the first movable contact piece, 13 is the second movable contact piece, 6G and 6
H and 6J indicate multi-stage cylindrical portions forming a rotating shaft, and 6I and 6K indicate rib portions that transmit rotational force to the first movable contact piece 12 and the second movable contact piece 13, respectively.

Even in the case of FIG. 8, the first movable contact piece 12 and the second movable contact piece 13 are functionally similar to the first movable contact piece 7 and the second movable contact piece shown in FIGS. They are similar to the movable contact piece 8 of No. 2.

However, the method of attaching it to the rotor 6 is different, and it is configured to be attached while being inserted into the rotating shaft.

For this purpose, the first movable contact piece 12 and the second movable contact piece 13 are provided with a hole in their center portions. In addition, rib portions 6I and 6K of the rotating shaft are provided so that the movable contact pieces 12 and 13 are rotated in a mutually insulated state by the rotational force of the rotor 6.
A corresponding notch is also formed.

The diameter of the cylindrical portion forming the rotational axis of the rotor 6 is gradually reduced toward the tip, and the center portion of the first movable contact piece 12 is located at the lower surface of the cylindrical portion 6G, and the center portion of the first movable contact piece 12 is located at the bottom of the cylindrical portion 6H. Second movable contact piece 1 on a plane
The central portions of the terminals 3 are pressed to provide appropriate elasticity, and both ends are maintained in good contact with the fixed terminals 9 and 10.

The other constructions of the housing 5 are similar to those shown in FIGS. 2 and 4 above.

Note that the housing claw stopper 6D provided at the tip of the rotating shaft of the rotor 6 can be replaced by a clasp or the like as in the conventional case, and is not necessarily required.

As explained in detail above, in the voltage changeover switch of this invention, two movable contacts are provided on the rotor, which are insulated from each other and connect to fixed terminals located substantially opposite to the rotational axis of the rotor. , enabling switching to obtain the desired voltage.

Effects of the invention According to this invention, the number of parts used is smaller than that of conventional voltage selector switches, and at the same time, the shot bar can be omitted, making it possible to downsize the switch, which eliminates most of the causes of malfunctions. removed,
Reliability is significantly improved.

Moreover, since the assembly work is simple, excellent practical effects such as being advantageous in terms of cost can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway exploded perspective view showing the main structure of a conventional voltage selector switch, and Figs. 2 1 to 5
3 is a circuit diagram showing an example of the use of the voltage changeover switch of this invention, and FIGS. Figure 5 is a diagram showing the internal structure of one embodiment of the voltage changeover switch.
FIGS. 1 and 2 are perspective views of essential parts showing how the first and second movable contact pieces are attached to the rotor shown in FIGS. 7Figure 1
2 is a diagram showing an example of the second movable contact piece, and FIG. 8 is a perspective view of essential parts showing another embodiment of the rotor and two movable contact pieces in the voltage changeover switch of this invention. In the drawings, 5 is a housing, 6 is a rotor, 7 is a first movable contact piece, 8 is a second movable contact piece,
9 is a fixed terminal with one contact, 10 is a fixed terminal with two contacts, 12 is a first movable contact piece, and 13 is a second movable contact piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A main body made of an insulating material, a hollow cylinder with one disc surface not covered, arranged in a circumferential manner below the cylinder in the main body, and , in a plane perpendicular to the rotation axis of the rotor 6,
are arranged facing each other around the rotational axis of the
Alternatively, a fixed terminal 9 that can be contacted with one of the second movable contact pieces, a fixed terminal 10 that can be contacted simultaneously with the first and second movable contact pieces, and a fixed terminal 9 that is located at the center of the circumference and rotates the rotor 6. Bearing portion 5 with which the tip of the shaft is engaged
C; a disc-shaped lid portion 6A made of an insulating material and covering a circular surface of the main body portion of the housing 5; and a groove 6B provided on one surface of the lid portion 6A. A rotor 6 having a rotating shaft 6C provided at the center of the other surface.
and directly fixed to the rotation axis of the rotor 6, extending in a radial direction with respect to the rotation axis of the rotor 6, and at both ends on a plane perpendicular to the rotation axis,
a first movable contact piece 7 (or 12) made of a thin plate-like elastic conductor having a contact portion that comes into contact with the fixed terminals 9, 10; directly fixed to the rotation axis of the rotor 6 in a state, extending in a radial direction with respect to the rotation axis of the rotor 6, and at both ends on a plane perpendicular to the rotation axis,
A voltage changeover switch comprising: a second movable contact piece 8 or 13 made of a thin plate-like elastic conductor having a contact portion that comes into contact with the fixed terminals 9 and 10.